POST method does not register user

I have screen to register user. I have a post api for this. But I am not able to register the user. I don't understand where I went wrong. I would be glad if you help.

MODEL:

struct NewUserModel: Codable {
    let name: String?
    let address: String?
    let year: String?
    let email: String?
    let district: String?
    let phone: String?
    let repassword: String?
    let city: String?
    let password: String?
    let surname: String?
    let tcno: String?
    let city: String?
}

WebService Class

class Webservice {   
func regisUser(email: String, password: String, repassword: String, name: String, surname: String, phone: String, year: String, city: String, country: String, district: String, address: String, tcno: String, completion: @escaping (Result<String, AuthenticationError>) -> Void) {
           
            guard let url = URL(string: "http://ec2-3-74-42-117.eu-central-1.compute.amazonaws.com:8080/api/insertuser") else {
                completion(.failure(.custom(errorMessage: "URL is not correct")))
                return
            }
            var urlRequest = URLRequest(url: url)
            urlRequest.httpMethod = "POST"
            
            let request = NewUserModel(name: name, address: address, year: year, email: email, district: district, phone: phone, repassword: repassword, city: city, password: password, surname: surname, tcno: tcno, ulke: ulke)
            
            do {
                let requestBody = try JSONEncoder().encode(request)
                urlRequest.httpBody = requestBody
                urlRequest.addValue("application/json", forHTTPHeaderField: "content-type")
               
            }catch let error {
                debugPrint(error.localizedDescription)
            }
            URLSession.shared.dataTask(with: urlRequest) { (data, httpUrlResponse, error) in
    
                if(data != nil && data?.count != 0)
                {
                    do {
                        let response = try JSONDecoder().decode([NewUserModel].self, from: data!)
                        
                        print("Success")
                    }
                    catch let decodingError {
                        debugPrint(decodingError)
                    }
                }
            }.resume()
        }
 }

When I press the register button, it does not register the user, but it prints success to the console.

LoginPageViewModel

    @Published var email: String = ""
    @Published var password: String = ""
    @Published var repassword: String = ""
    @Published var name: String = ""
    @Published var surname: String = ""
    @Published var phone: String = ""
    @Published var year: String = ""
    @Published var city: String = ""
    @Published var city: String = ""
    @Published var district: String = ""
    @Published var address: String = ""
    @Published var tcno: String = ""

func Register(){

        Webservice().regisUser(email: email, sifre: sifre, resifre: resifre, ad: ad, soyad: soyad, phone: phone, dogumyili: dogumyili, ulke: ulke, sehir: sehir, ilce: ilce, adres: adres, tcno: tcno) { result in
            switch result {
                case .success(_):
                DispatchQueue.main.async {
                    print("ok)                }
            case .failure(let error):
                print(error.localizedDescription)
            }
        }
        
    }

LoginPage View

    @StateObject var loginData: LoginPageModel = LoginPageModel()

 // Login Button...
                    Button {
                        if loginData.registerUser{
                            loginData.Register()
                        }
                        else{
                            loginData.Login()
                        }